On Thu, 23 Dec 2004 08:20:30 +0000, John Woodgate
wrote:

I read in sci.electronics.design that budgie wrote (in
) about 'Tektronix 465
Scope', on Thu, 23 Dec 2004:

May well have been toluene. It was often used as a cleaner in all sorts
of areas, some as pedestrian as the T/R/S plugs on old lamp-signalling
telephone switchboards. Unfortunately proved to be a carcinogen and was
banned, but it WAS used to clean a myriad of hardware in a myriad of
situations.

Toluene is one of the aromatics that is NOT carcinogenic. From the ATSDR
web site:

(snip)

That was the reason used when it was banned here, merit notwithstanding.